Impeccable

Turn AI slop into interfaces you’re proud to ship. Impeccable gives your agent the design expertise to build from scratch, improve what you have, and stay true to your design system.

Why Impeccable?

Anthropic's frontend-design was the first widely-used design skill for Claude. Impeccable started from there.

Every model trained on the same SaaS templates. Skip the guidance and you get the same handful of tells on every project: Inter for everything, purple-to-blue gradients, cards nested in cards, gray text on colored backgrounds, the rounded-square icon tile above every heading.

Impeccable adds:

One setup flow. /impeccable init records durable product truth in PRODUCT.md, so later commands know the audience, purpose, operating context, constraints, voice, and evidence without confusing those facts with surface-level visual direction.

Commands. A shared design vocabulary with your AI: polish, audit, critique, distill, animate, bolder, quieter, and more.

Deterministic detector rules plus LLM-only critique checks. The CLI and browser extension run the deterministic rules with no LLM and no API key.